1FEATURES
2• Low 1.5V Operation
• Push-pull Output with 50μA Source Current
Capability
• Two Selectable Gains
• Very Accurate Over Wide Temperature Range
of −50°C to +150°C
• Low Quiescent Current
• Output is Short-circuit Protected
• Extremely Small DSBGA Package
• Footprint Compatible with the Industry-
standard LM20 Temperature Sensor

APPLICATIONS
• Cell Phones
• Wireless Transceivers
• Battery Management
• Automotive
• Disk Drives
• Games
• Appliances

KEY SPECIFICATIONS
• Supply Voltage 1.5V to 5.5V
• Supply Current 5.4 μA (typ)
• Output Drive ±50 μA
• Temperature Accuracy
– 20°C to 40°C ±1.5°C
– –50°C to 70°C ±1.8°C
– –50°C to 90°C ±2.1°C
– –50°C to 150°C ±2.7°C
• Operating Temperature −50°C to 150°C

DESCRIPTION
The LM94023 is a precision analog output CMOS
integrated-circuit temperature sensor that operates at
a supply voltage as low as 1.5 Volts. Available in the
very small four-bump DSBGA 0.8mm x 0.8mm) the
LM94023 occupies very little board area. A class-AB
output structure gives the LM94023 strong output
source and sink current capability for driving heavy
loads, making it well suited to source the input of a
sample-and-hold analog-to-digital converter with its
transient load requirements, This generally means the
LM94023 can be used without external components,
like resistors and buffers, on the output. While
operating over the wide temperature range of −50°C
to +150°C, the LM94023 delivers an output voltage
that is inversely porportional to measured
temperature. The LM94023's low supply current
makes it ideal for battery-powered systems as well as
general temperature sensing applications.
A Gain Select (GS) pin sets the gain of the
temperature-to-voltage output transfer function. Either
of two slopes are selectable: −5.5 mV/°C (GS=0) or
−8.2 mV/°C (GS=1). In the lowest gain configuration,
the LM94023 can operate with a 1.5V supply while
measuring temperature over the full −50°C to +150°C
operating range. Tying GS high causes the transfer
function to have the largest gain for maximum
temperature sensitivity. The gain-select inputs can be
tied directly to VDD or Ground without any pull-up or
pull-down resistors, reducing component count and
board area. These inputs can also be driven by logic
signals allowing the system to optimize the gain
during operation or system diagnostics.